White shirt with dark blue pants?

Yep!

Yes. A good rule of thumb is a white shirt goes with any color of pants.

I’m pretty sure white shirts go with anything. On the other hand, there’s also finding a tie that matches, if you decide to wear one. I couldn’t help you with that, though.

Male or female? Doesn’t really matter, they go just fine.

Of course! White goes with any color.

Yes! One of the “fashion” examples for me is Dustin Hoffman in The Graduate putting on a crisp white button down collared shirt with a pair of dark blue jeans. You can go anywhere in that, just ask Ralph Lauren.

Absolutely. Very crisp look.

Yup.
Black shoes if you have them.

They go but there’s a risk it will look like a uniform if you’re not carful.

They go well

Of course. Very nautical.